/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets.gp.patient.prescription;

import be.ugent.medirem.logic.PrescriptionRemote;
import be.ugent.medirem.logic.TaskRemote;
import be.ugent.medirem.persistence.entity.details.MedicationTaskDetails;
import be.ugent.medirem.persistence.entity.details.PrescriptionDetails;
import java.io.IOException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Roelie
 */
public class ViewPrescriptonDetailsServlet extends HttpServlet {

    @EJB
    private TaskRemote taskBean;
    @EJB
    private PrescriptionRemote prescriptionBean;

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        boolean validate = true;
        String param = request.getParameter("id");

        if (param != null) {
            try {
                Long prescriptionId = Long.parseLong(param);

                Long pId = (Long) request.getSession().getAttribute("pid");
                
                if (pId == null) {
                    validate = false;
                    request.getSession().setAttribute("flash", "An error occured when trying to  get details about this prescription: no patient selected!");
                } else {

                    PrescriptionDetails pDetails = prescriptionBean.getPrescriptionDetails(prescriptionId);
                    request.setAttribute("prescription", pDetails);

                    List<MedicationTaskDetails> tDetails = taskBean.getTasks(pId, prescriptionId);
                    request.setAttribute("tasks", tDetails);

                    request.getRequestDispatcher("/gp/patient/prescription/details.jsp").forward(request, response);

                }
            } catch (Exception ex) {
                Logger.getLogger(ViewPrescriptonDetailsServlet.class.getName()).log(Level.SEVERE, null, ex);
                validate = false;
                request.getSession().setAttribute("flash", "An error occured when trying to get details about this prescription!");
            }
        } else {
            validate = false;
        }
        if (!validate) {
            response.sendRedirect(request.getContextPath() + "/gp/patient/prescriptions");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
